Nut-lock



UNITED STATES PATENT OFFICE.

WALTER B. JOHNSON, OF WATERLOO, INDIANA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 257,014, dated April25, 1882.

Application tiled lTuly 2S, 1881.

To all whom it may concern:

Beit known that I, WALTER BROWN JOHN- SON, ot1 Waterloo, in the countyOt De Kalb and State of Indiana, have invented a new andV ImprovedNut-Lock, ot' which the following is a full, clear, and exactdescription.

The Object ot' my invention is to provide a new and improved devicev toprevent nuts or bolts from being loosened by continued vibrations orshocks.

The invention consists in a strip of metal fitting between two adjoiningnuts and attached to a washer-plate fastened outside of the tshplate,the ends of this strip being bent inward toward the washer-plate whenthe nuts are being screwed on, and when the nuts are tightened the stripis straightened, so that the nuts would strike the ends of the strip ifthey should happen to turn.

In the accompanying drawings, Figure 1 is a horizontal sectional view ofa rail provided with my improved nut-lock on the line m, Fig. 2. Fig. 2is a cross-sectional eleva-tion of the same on the line y y, Fig. l.

Similar letters of reference indicate corresponding parts.

A metal strip, A,ofsuel1 length that it will tit in between twoadjoining nuts, B,is attached to the outer surface of a wasi1erplate, O,by means of a rivet, D, and is held a short distance from this plate bya small block, E. The bolts F are passed through the plate O, the

fish-plates G G, the rail R, and through rub- (No model.)

ber washers H, interposed between the plate C and the sh-plate G. Theends of the strip A are then pressed against the plate C, as indicatedin dotted lines in Fig. l, and the nuts B are screwed on the bolts F andare drawn y up tight. Then the ends of the strip A are drawn outward, sothat this strip will be straightened, as shown in full lines in Fig. 1,If the nuts begin to loosen and turn, they will strike against the endsof the strip A and prevent the rotation of the nut, and consequentlyalso the loosening of the same.

The joint is very elastic. The lock can be used several times, can befastened or unfastened very rapidly, and requires no special tools forapplying it.

I am aware that it is not new to use a plate with end holes to tit overthe nuts and pivoted in the middle to the washer-plate that connects thebolts; but

The elastic plate A, made shorter than the distance betweenl the nuts BB, and at the middle rigidly connected with the washer-plate O, whichconnects the bolts F F, whereby the ends of said .plate may be bentdownto allow the nuts to be screwed on or oit', but otherwise will resistand prevent the nuts from turning around on. the screws, as described.

WALTER BROWN JOHNSON.

Witnesses:

HERBERT D. ARMSTRONG, NOAH H. WEAVER.

